[FFmpeg-devel] [PATCH] libavfi/colorchannelmixer: add sepia tones example to doc

[Paul B Mahol]

On 7/17/13, Lukasz Marek <lukasz.m.luki at gmail.com> wrote:
> ---
>  doc/filters.texi |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/doc/filters.texi b/doc/filters.texi
> index 785ce85..ac31228 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -2371,6 +2371,11 @@ Convert source to grayscale:
>  @example
>  colorchannelmixer=.3:.4:.3:0:.3:.4:.3:0:.3:.4:.3
>  @end example
> + at item
> +Convert source to sepia tones:
> + at example
> +colorchannelmixer=.393:.769:.189:0:.349:.686:.168:0:.272:.534:.131


How you got this numbers?

Red and green could overflow, and blue is not using full scale, max
can be 0.937, while idealy it should be 1.

> + at end example
>  @end itemize
>
>  @section colormatrix
> --
> 1.7.2.5
>
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